An extrinsic Fabry-Perot interferometric optical fiber sensor system for hydrogen detection

Zhen Yang; Min Zhang; Ming Lei; Xiujuan Yu; Yanbiao Liao; Shurong Lai; Qian Tian; Qisheng Li; Yi Zhang; Zhi Zhuang

doi:10.1117/12.835263

5 October 2009 An extrinsic Fabry-Perot interferometric optical fiber sensor system for hydrogen detection

Zhen Yang, Min Zhang, Ming Lei, Xiujuan Yu, Yanbiao Liao, Shurong Lai, Qian Tian, Qisheng Li, Yi Zhang, Zhi Zhuang

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750323 (2009) https://doi.org/10.1117/12.835263
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

An extrinsic Fabry-Perot interferometric (EFPI) optical fiber hydrogen sensor based on palladium silver (Pd-Ag) film is designed for hydrogen leakage detection. The sensing mechanism of such a sensor is based on the mechanical stress that is induced in the Pd-Ag film when it absorbs hydrogen. The sensor system which is portable and suitable for field detection is formed by a conventional coupler, a low-power LED operating at 850 nm, and a high resolution miniature spectrometer. To obtain the absolute length of the EFPI air gap, a cross-correlation signal processing method is introduced.The sensor is suitable for monitoring concentrations of hydrogen below the lower explosive limit.

Citation Download Citation

Zhen Yang, Min Zhang, Ming Lei, Xiujuan Yu, Yanbiao Liao, Shurong Lai, Qian Tian, Qisheng Li, Yi Zhang, and Zhi Zhuang "An extrinsic Fabry-Perot interferometric optical fiber sensor system for hydrogen detection", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750323 (5 October 2009); https://doi.org/10.1117/12.835263

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